Fostex FE108-Sol Full Range Speakers

After reading some very positive report on the performance of Fostex FE108-Sol full range speakers in Hobby HiFi magazine I knew I have to give them a try. There was an interesting report in Hobby HiFi 6/2016 where the performance of the chassis has been thoroughly tested. By comparing the measurements of this special edition speakers with the series model FE108 Sigma in Hobby HiFi 3/2016 several things have become apparent: the frequency response of FE 108-Sol at 30 degrees off-axis is perfectly linear, waterfall graph shows fast and uniform decay, impulse response characterises with sharp and clean spike, high frequencies reaching up to 35 kHz. It was also reported that FE108-Sol inside BK108 enclosure outperforms the standard Fostex FE108 Sigma with not a small margin. The conclusion: “FE 108-SOL is the best Fostex wide band for a long time. In a horn enclosure it grows beyond itself.” 

Gasket and pair of connecting cables are included
Gasket and pair of connecting cables are included
Fostex FE108-Sol Full Range Speaker
The magnet is more massive and has a diameter of 100 millimeters. The Sigma type has only 90 millimeters magnet.
Fostex FE108-Sol Full Range Speaker
A perfectly normal centering spider
Fostex FE108-Sol Full Range Speaker
In place of the distinctively shaped diaphragm, dust cap, surround and centering spider of the series chassis, there are completely unspectacular “soft parts”:  smooth diaphragm, simple concave textile surround and a perfectly normal centering spider.

First impressions are rather positive. The drivers are running without any notch filter correction, so directly coupled through Belden 9497 speaker cable with the amplifier. Sure they need some break-in time to develop and currently the upper midrange is a bit more pronounced but I expected they will settle down. There is definitely more detail, wider and deeper soundstage, bass is fast and very well articulated. The most amazing thing is how easy these speakers render space and sonic details which I think is due to the extended high frequency spectrum.

Fostex FE108-Sol Full Range Speaker in BK108 enclosure
Fostex FE108-Sol Full Range Speaker in BK108 enclosure

That’s it for now fellows, will keep you informed about further development of these beautiful speakers.

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